Upgrade ElasticUtils to version 0.10.1

This is not entirely correct. What we want here is to:
1. From all UserProfiles with ids in id_list
2. Filter out the ones that contain enough information to get included in the public index (defined in manages.PUBLIC_INDEXABLE_FIELDS)
3. Then set their privacy level to PUBLIC so only public information gets extracted on the next step.

With what we have now, we skip step two. What you really want is
```
        if public_index:
            qs = qs.public_indexable().privacy_level(PUBLIC)
```